Column-form.



H. JENTZER.

COLUMN FORM.

APPLICATION FILED APR. 19. 191B.

Patented Ju1y 116, 1918.

2 SHEETS-SHEET 1- //V VE N TOR.

ATTORNE Y.

NFFEB T I HENRY JENTZER, OF ST. LOUIS, MISSOURI.

COLUMN-FORM.

ament.

' Specification of Letters Patent.

l atented July is, 1918.

Application filed April 19, 1918. Serial No. 229,564.

.To all whom it may concern Be it k nown that I, HENRY JENTZER, a cltizen of the United States, residing at St.

Louis, State of Missouri, have invented oer-- tain new and useful Improvements in Column-Forms, of-which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming a part hereof. v

The present invention is directed to metallic sectional column-forms, the object of the invention being to provide a knock-down form which shall be simple, readily assembled and taken apart, one which will maintain the desired rigidity during. the

pouring and setting of the concrete, and one of Fig. 3; Fig; 5 is a detached perspective of the coupling block employed to respectively connect the sections of the column to one another andthelongitudinal edges of any given section; Fig. 6 is a plan detail of a portion of the binding ring and latch or coupling block thereof; Fig. 7 is an elevational view of the parts shown in Fig. 6; Fig. 8 is a cross-sectional detail on the line 8-8 of Fig. 7 and Fig. 9 is a detached perspective of the latch or coupling 'block carried by the binding ring.

Referring to the'drawings, a, b, 0, represent a series of cylindrical column sections composed of sheet metal and bent to form vertical butt joints or seams m, the ends of the successive sections being brought into contiguous relation to form the horizontal butt joints or seams m as fully shown 'on the drawings. In the present embodiment of my invention the horizontal seams m are.

overlapped and protected by the flanges of the sectional binding T-rings' 1, said rings being composed of two semicircular sections the adjacent terminals of which are connccted by suitable latch or coupling blocks 2, a block being pivoted to one section and adapted to be swung into engagement with v the adjacent section to which it is secured by a split or cotter pin 8. The block.2 is formed with a recess 7 to receive the-webs of the T sections of thering 1 as clearly shown in Fig. 9, where the block is shown as composed ofthe side pieces t, t, separated by being riveted together. v structthe block in any other suitabl'e mechanical manner.

In assembling the column sections (a, b, c,

a spacer member a at one corner, the parts. I may of'cours'e conetc.) the vertical seams m of successive sections are disposed out of alinement and preferably one hundred and eighty degrees apart '(Fig. 1), said seams being over-lapped and protected by the longitudinal stiffening -members or Ts 4 which terminate at the rings 1, .the ends of the stiffening members being cut away or recessed at the inner corncrs (see recess 7'' Fig.- 4) to allow the end of the web of the member to engage the side of the web of the ring 1, and to permit the end of the flange thereof to engage the edge of the flange of the ring as clearly indicated in Fig. 4. Secured to each column section at a point opposite the vertical longitudinal seam m thereof is an anchor 01' bracket 5, so that when the sections are assembled such anchor (being a T) will .be in alinement with the member 4 and come adjacent to the flange of the ring 1 (Fig. 4s). The adjacent ends of the members 4 and 5 are connected by a coupling block 6, said block being formed with a central transverse recess h of the deI-.

sired depth to pass over the web of the ring 1, and with a longitudinal recess h'to re ceivc the webs of the members 4 and 5, the

block being secured to the members 4: and 5 by suitable split or cotter .pins 7, 7, which may be readily withdrawn when the form is to be disassembled. Each column sectionis likewise provided on each side of the longitudinal seam m with a plurality of T brackets 8, 8, spaced sufficiently apart to 'receive between them the flange of the longi tudinal stiffening member 4 (Figs, land 2) the Webs of said brackets being connected by coupling blocks 6 identical in construe-- tion with the blocks 6 com) .ing the members 4 and 5. ,In applyin the block .6 to

the brackets 8, 8, the transverse recess thereof is passed over the web of the stiffener 4;] and the longitudinal recess over the webs of the brackets, after'which the block is secured by the cotter pins 7, 7', as shown (Fig. 1). The block 6 (6) may beforged in one piece or made of a plurality of pieces. In the present embodiment of my invention the same is shown as composed of three pieces, to Wit, an inner spacing piece a! and the outer pieces d as detailed in Figs. 4 and ,5. either side of the anchor bracket 5, which as previously described, serves to secure the adacent end of thelongitudinal stiflening member 4 through the medium of the con necting block '6', each section is provided with similar 'T brackets 5 which alinev with similar T brackets 5". The brackets 5, 5",

areso spaced as to permit the flange of the ring 1- to be received between them, said brackets being connected by coupling blocks 6 identical in construction with the blocks 6,43 and operating to receive the webs of the brackets and ring 1, respectively, theblocks being held in place by cotter pins. 7" as shown (Fig. 6).

The operation will be obvious from the foregoing description, but briefly may be stated as follows: The sections of the column are first formed by bending each into cylindrical form, the longitudinal edges being brought together to form butt joints m. As one section is superposed over another their edges are brought into contacting or abutting relation to form the butt joints m.

The stifieners 4 are applied to the seams m and the parts of the tube or section on opposite sides of the seam are tied together by the blocks 6- which are slipped-overthe webs of-the stifleners and'over the webs of the brackets 8, and the cotter pins 7 inserted into alining or registering holes in the blocks and webs of the brackets respectively. The binding rings 1 are then applied, the flanges of the'ring sections being inserted into the recess r of the stifl'eners, that is to say between the column wall and the inner edge of the web of the stiffener, the width of the recess 9" being suflicient'to admit the full width of one half the flange of the ring (Fig. 4:) so that the middle of the ring flange will come opposite the horizontal seam or joint m; The ends of the ring sections are then' connected together by the cotter pins 3.passed through the latches or blocks 2 and through the webs of said ring sections. The rings 1 being inposition the operator then couples the ends of the stiffeners 4 to the anchor brackets '5 by means of the blocks 6 and pins 7 and the brackets 5 to the brackets'5 by means of the blocks 6 and pins 7 thus completing the assembling of the parts. To removethe column sections after the'concrete has been poured into the form and set, the operator detaches the coupling blocks 6, 6, so as to releasethe stiffener members 4, then detaches said members, and by pulling out one of-the pins 3 and swinging outwardly the corresponding latch block 2, he can swing outward the corresponding section of the binding ring 1 (see dotted position of the ring in Fig. 2') thereby permitting the removal of the ring. Or,

both pins'3 may. be-withdrawn permitting the ring sections to be parted, and detached from the form. The sheet sections a, 6,0, may then be loosened and opened out and removed from the cast concrete column. The/"brackets 5', 5, are riveted toithe sheet metalsections as detailed in F 1g. 8. I may of course depart from the details here shown without inany wise affecting the nature or spirit of my invention. The rings 1 obviously prevent the walls of the form from bulging outwardly under the weight and pressure of the concrete within, and the 4 members 4: serve to maintain the .form'r-igid and agamst deflection. A form such as here shown and described may be assembled and disassembled in a very shortspace of time, Y

without material waste and at a reduced cost of labor. The lengths of the sections average three feet though I amnot l mitedinthat respect.

Having described my invention what I claim is: l I

1.- A column form comprising a series of tubular sections disposed in abutting relation, each section being formed with a longitudinal butt joint out of alinement with the corresponding joint of an adjacent section, binding rings encompassing the column at the oints between ad acent sections, longitudinal stiffening members opposite the longitudinal joints of the several sections,

means spanning the stiffening members and connecting together the portions of'each sect1on disposed on opposite sides of a longitudinal joint, and means for securing in position the binding rings aforesaid.

2. A column form comprising a series of sheet metal tubular sections disposed in abutting relation and formed with longitu dinal butt joints relatively out of alinement with one another, sectional binding rings encompassing the column opposite the joints between the sections, longitudinal stiflening members bearing with their terminals, against the rings, disposed opposite the longitudinal joints, means for coupling the ends of a stiffener of one section to the adjoints of successive sections and having their terminals engaging the sides of the webs of the Trings, T anchor brackets on each section alining with the longitudinal stiffener of an adjacent section, detachable coupling blocks spanning the rings and connecting the adjacent ends of the anchor brackets and stiifener members, means for connecting the adjacent'ends of consecutive sections on either side of the stiifener of a section, and means for spanning the stifienersand connecting together the parts of each section disposed on opposite sides of the longitudinal joint of said section.

4. In a column form of the character described, a T stiffener member having .its flange engaging the column, a block provided with a transverse recess for receiving the web of the stiffener, and T brackets disposed on the column on opposite sides of the stifiener, the block being provided with a longitudinal recess for receiving the webs of said brackets, and pins for temporarily securing the block to said brackets.

5. In a column form of the character de scribed and composed of independent sections, a T longitudinal stiffener having its flange engaging a section and extendingto points adjacent the ends of the section, a T

binding ring encompassing .the column atthe adjacent ends of contiguous sections, the end of the web of the stiffener engaging the side of the web of the ring, a T bracket on a section in alinement with the stiffener of an adjacent section and in proximity to the ring and on the opposite side thereof from the stiffener, a coupling block provided with a transverse recess for receiving the Web of- ,eners disposed opposite the lpngitudina-l joints of successive sections, the oints of the several sections being out of alinement, means for securing the ring sections together, means spanning the rings for securing the ends of a stiffener of one section. to the adjacent ends of the sections on either side thereof, means disposed opposite the joints between the sections on either side of the longitudinal seam of a section forv additionally securing two contiguous sections together, and means spanning the stifieners and secured to the portions of each section on either side of the longitudinal joint thereof for securing the stiffener in position and at the same time connecting together the portions of the section on opposite sides of the longitudinal joint aforesaid.

In testimony whereof I afiix my signature, in presence of two Witnesses.

HENRY JENTZER. Witnesses EMIL STAREK, ELSE M. SIEGEL. 

